Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e80291f6548552…

MALICIOUS

PDF

74.9 KB Created: 2021-09-05 03:37:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4f4719f60a9cd21ba44811304aa4035d SHA-1: da05f5a932dc54ab095d1d8c28d0ee3be02c8596 SHA-256: e9e80291f6548552e6c95d8aa6fbcff4f45d4329aaad29195e6855a2fac6572a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous URLs pointing to various websites, including those hosted on compromised CMS platforms. The presence of 'utm_term' parameters in some URLs suggests an attempt to track user engagement with potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pistant.ru/uplcv?utm_term=gwyddion+software+manual PDF link annotation
    • http://habitat3.eu/userfiles/files/72801366575.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102e6973f74b---56074340343.pdfIn PDF document text
    • http://amindoost.ir/images/upload/files/dixakazukuxaxogupedi.pdfIn PDF document text
    • http://rlangkhan.com/upload/userfiles/files/mikolanefovuta.pdfIn PDF document text
    • https://slaterlighting.com/wp-content/plugins/super-forms/uploads/php/files/dcd80b8d843f6ca08a3f0c3775334344/69150590538.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608caba31d955---9066228000.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/0b88f7eed93ad2f9e254f946a449b632/nuwusefisadapavizu.pdfIn PDF document text
    • http://obras.ru/sites/default/files/uploads/70892567345.pdfIn PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/21802995483.pdfIn PDF document text
    • https://tidaksusah.com/contents//files/mifetozukopifot.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/14385157633.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082f029cf6f1---weloruzogorusufuvene.pdfIn PDF document text
    • https://inmaabiladi.com/userfiles/files/fapibenagezetuzupar.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/79029603678.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dafccc5442---bajudiboguvas.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ff0b4c79a---pojaguma.pdfIn PDF document text
    • http://abwvictory.com/uploads/files/deseleguka.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/27d38807bc57c6f55def9b17289fa0b9/pimixebezijijokonipadimul.pdfIn PDF document text
    • http://ags-sib.ru/ckfinder/userfiles/files/xotebeluxuri.pdfIn PDF document text
    • https://strechybenesov.cz/content/kakomami.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/u5nii9320ke272pplvfgc8f2at/97632870117.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/f8419da9ed882cf04caa4b8c5a518a72/notixemebadatijuwagasu.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d448cd93e3---pifedeveveguda.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/fixuzulo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC239 16844 bytes
SHA-256: 01d5807c4675cba23b75d97752a9371902191376a5e93eb71cfc38c38427f733
font_01_sfnt_off0000ed6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10585 10856 bytes
SHA-256: cc9a8388c512c5ee95d64686fdaa0f6e316a83651d5e9a6da1f3a6b1d0662c98

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